Struct rotor_test::MemIo

pub struct MemIo(_);

In memory stream

The struct pretends to be mio::Evented but it have unimplemented panic when actually added to the loop. I.e. it should be used in tests which use plain state machine, and not the event loop.

Clarification: it implements Read/Write but, it's not a pipe. I.e. buffers for Read and Write are separate. You use push_xxx methods to add data for the next Read::read.

You should clone the stream. Feed one to the application and second one to the unit testing code.

Methods

impl MemIo

fn new() -> MemIo

Create a stream

Stream start empty

fn push_bytes<T: AsRef<[u8]>>(&mut self, val: T)

Push some bytes to an input buffer of an application

fn shutdown_input(&self)

Marks input as closed so application gets end-of-stream event on next read

fn output_str(&self) -> String

Get output as a string

This is created by String::from_utf8_lossy so kinda works for binary data too, but not exactly. If you need to compare some non-textual data use output_bytes()

The data in the buffer are not discarded. Next call will return same data again.

fn output_bytes(&self) -> Vec<u8>

Get data in the output buffer

The data in the buffer are not discarded. Next call will return same data again.

Trait Implementations

impl Clone for MemIo

fn clone(&self) -> MemIo

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl SocketError for MemIo

fn take_socket_error(&self) -> Result<()>

impl Debug for MemIo

fn fmt(&self, fmt: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Read for MemIo

fn read(&mut self, val: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

fn chars(self) -> Chars<Self>

🔬 This is a nightly-only experimental API. (io)

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an Iterator over chars.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl Write for MemIo

fn write(&mut self, val: &[u8]) -> Result<usize>

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.

impl Evented for MemIo

fn register(
    &self,
    _selector: &mut Selector,
    _token: Token,
    _interest: EventSet,
    _opts: PollOpt
) -> Result<()>

fn reregister(
    &self,
    _selector: &mut Selector,
    _token: Token,
    _interest: EventSet,
    _opts: PollOpt
) -> Result<()>

fn deregister(&self, _selector: &mut Selector) -> Result<()>